Abstract
Riparian wetlands (RW) are important variable source areas for runoff generation. They are usually characterised by a combination of groundwater exfiltration—which maintains saturated conditions in low-lying organic-rich soils—and direct precipitation. Both processes interact to generate overland flow as a dominant runoff process. The small-scale details of groundwater–surface water (GW–SW) interactions are usually not well understood in RW. Here, we report the results of a study from an experimental catchment in the Scottish Highlands where spatio-temporal runoff processes in RW were investigated using isotopes, alkalinity and hydrometric measurements. We focused on perennial micro-catchments within the RW and ephemeral zero-order channels draining peatland hollows and hummocks to better understand the heterogeneity in GW–SW interactions. The 12-month study period was dominated by the wettest winter (December/January) period on record. Runoff generation in the RW was strongly controlled by the local groundwater response to direct rainfall, but also the exfiltration of groundwater from upslope. This groundwater drainage is focused in the hollows in ephemeral and perennial drainage channels, but in wet conditions, as exfiltration rates increase, can affect hummocks as well. The hollows provide the dominant areas for mixing groundwater, soil water and direct rainfall to deliver water to the stream network as hollows “fill and spill” to increase connectivity. They also provide wet areas for evaporation which is evident in enriched isotope signatures in summer. Although there is some degree of heterogeneity in the extent to which groundwater influences specific micro-catchments, particularly under low flows, the overall isotopic response is quite similar, especially when the catchment is wet and this responses can explain the isotope signatures observed in the stream. In the future, more longitudinal studies of micro-catchments are needed to better explain the heterogeneity observed.
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References
Acreman, M., & Holden, J. (2013). How wetlands affect floods. Wetlands, 33(5), 773–786. https://doi.org/10.1007/s13157-013-0473-2.
Ala-aho, P., Soulsby, C., Wang, H., & Tetzlaff, D. (2017). Integrated surface-subsurface model to investigate the role of groundwater in headwater catchment runoff generation: a minimalist approach to parameterisation. Journal of Hydrology, 547, 664–677. https://doi.org/10.1016/j.jhydrol.2017.02.023.
Banner, A., & MacKenzie, W. (1998). Riparian areas: providing landscape habitat diversity part 5 of 7. Smithers.
Barthold, F. K., Tyralla, C., Schneider, K., Vaché, K. B., Frede, H.-G., & Breuer, L. (2011). How many tracers do we need for end member mixing analysis (EMMA)? A sensitivity analysis. Water Resources Research, 47(8). https://doi.org/10.1029/2011WR010604.
Belyea, L. R., & Clymo, R. S. (2001). Feedback control of the rate of peat formation. Proceedings of the Royal Society B: Biological Sciences, 268(1473), 1315–1321. https://doi.org/10.1098/rspb.2001.1665.
Birkel, C., Soulsby, C., & Tetzlaff, D. (2011a). Modelling catchment-scale water storage dynamics: reconciling dynamic storage with tracer-inferred passive storage. Hydrological Processes, 25(25), 3924–3936. https://doi.org/10.1002/hyp.8201.
Birkel, C., Tetzlaff, D., Dunn, S. M., & Soulsby, C. (2011b). Using time domain and geographic source tracers to conceptualize streamflow generation processes in lumped rainfall-runoff models. Water Resources Research, 47(2). https://doi.org/10.1029/2010WR009547.
Blumstock, M., Tetzlaff, D., Malcolm, I. A., Nuetzmann, G., & Soulsby, C. (2015). Baseflow dynamics: multi-tracer surveys to assess variable groundwater contributions to montane streams under low flows. Journal of Hydrology, 527, 1021–1033. https://doi.org/10.1016/j.jhydrol.2015.05.019.
Blumstock, M., Tetzlaff, D., Dick, J. J., Nuetzmann, G., & Soulsby, C. (2016). Spatial organization of groundwater dynamics and streamflow response from different hydropedological units in a montane catchment. Hydrological Processes, 30(21), 3735–3753. https://doi.org/10.1002/hyp.10848.
Bragg, O. M. (2002). Hydrology of peat-forming wetlands in Scotland. Science of the Total Environment, 294(1–3), 111–129. https://doi.org/10.1016/S0048-9697(02)00059-1.
Bullock, A., & Acreman, M. (2003). The role of wetlands in the hydrological cycle. Hydrology and Earth System Sciences, 7(3), 358–389. https://doi.org/10.5194/hess-7-358-2003.
Chimner, R. A., & Hart, J. B. (1996). Hydrology and microtopography effects on northern white-cedar regeneration in Michigan’s Upper Peninsula. Canadian Journal of Forest Research, 26(3), 389–393. https://doi.org/10.1139/x26-043.
Coplen, T. B. (2011). Guidelines and recommended terms for expression of stable-isotope-ratio and gas-ratio measurement results. Rapid Communications in Mass Spectrometry, 25(17), 2538–2560. https://doi.org/10.1002/rcm.5129.
Correa, A., Windhorst, D., Tetzlaff, D., Crespo, P., Célleri, R., Feyen, J., & Breuer, L. (2017). Temporal dynamics in dominant runoff sources and flow paths in the Andean Páramo. Water Resources Research, 53(7), 5998–6017. https://doi.org/10.1002/2016WR020187.
Craig, H., Gordon, L. I., & Horibe, Y. (1963). Isotopic exchange effects in the evaporation of water: 1. Low-temperature experimental results. Journal of Geophysical Research, 68(17), 5079–5087. https://doi.org/10.1029/JZ068i017p05079.
Dansgaard, W. (1964). Stable isotopes in precipitation. Tellus, 16(4), 436–468. https://doi.org/10.3402/tellusa.v16i4.8993.
Devito, K. J., Hokanson, K. J., Moore, P. A., Kettridge, N., Anderson, A. E., Chasmer, L., Hopkinson, C., Lukenbach, M. C., Mendoza, C. A., Morissette, J., Peters, D. L., Petrone, R. M., Silins, U., Smerdon, B., & Waddington, J. M. (2017). Landscape controls on long-term runoff in subhumid heterogeneous Boreal Plains catchments. Hydrological Processes, 31(15), 2737–2751. https://doi.org/10.1002/hyp.11213.
Didszun, J., & Uhlenbrook, S. (2008). Scaling of dominant runoff generation processes: nested catchments approach using multiple tracers. Water Resources Research, 44(2), 1–15. https://doi.org/10.1029/2006WR005242.
Eppinga, M. B., Rietkerk, M., Borren, W., Lapshina, E. D., Bleuten, W., & Wassen, M. J. (2008). Regular surface patterning of peatlands: confronting theory with field data. Ecosystems, 11(4), 520–536. https://doi.org/10.1007/s10021-008-9138-z.
Esteves, M., Faucher, X., Galle, S., & Vauclin, M. (2000). Overland flow and infiltration modelling for small plots during unsteady rain: numerical results versus observed values. Journal of Hydrology, 228(3–4), 265–282. https://doi.org/10.1016/S0022-1694(00)00155-4.
Fiedler, F. R., & Ramirez, J. A. (2000). A numerical method for simulating discontinuous shalloe flow over and infiltrating surface. International Journal for Numerical Methods in Fluids, 32(6), 219–240 Available at: https://doi.org/10.1002/(SICI)1097-0363(20000130)32:2%3C219::AID-FLD936%3E3.0.CO;2-J.
Fischer, B. M. C., Rinderer, M., Schneider, P., Ewen, T., & Seibert, J. (2015). Contributing sources to baseflow in pre-alpine headwaters using spatial snapshot sampling. Hydrological Processes, 29(26), 5321–5336. https://doi.org/10.1002/hyp.10529.
Frei, S., & Fleckenstein, J. H. (2014). Representing effects of micro-topography on runoff generation and sub-surface flow patterns by using superficial rill/depression storage height variations. Environmental Modelling and Software, 52, 5–18. https://doi.org/10.1016/j.envsoft.2013.10.007.
Frei, S., Lischeid, G., & Fleckenstein, J. H. (2010). Effects of micro-topography on surface-subsurface exchange and runoff generation in a virtual riparian wetland—a modeling study. Advances in Water Resources, 33(11), 1388–1401. https://doi.org/10.1016/j.advwatres.2010.07.006.
Geris, J., Tetzlaff, D., McDonnell, J. J., & Soulsby, C. (2015). The relative role of soil type and tree cover on water storage and transmission in northern headwater catchments. Hydrological Processes, 29(7), 1844–1860. https://doi.org/10.1002/hyp.10289.
Gilman, K. (1994). Hydrology and wetland conservation. Wiley Available at: https://books.google.co.uk/books?id=CVbuAAAAMAAJ.
González, E., Felipe-Lucia, M. R., Bourgeois, B., Boz, B., Nilsson, C., Palmer, G., & Sher, A. A. (2016). Integrative conservation of riparian zones. Biological Conservation, 211, 20–29. https://doi.org/10.1016/j.biocon.2016.10.035.
Jencso, K. G., McGlynn, B. L., Gooseff, M. N., Bencala, K. E., & Wondzell, S. M. (2010). Hillslope hydrologic connectivity controls riparian groundwater turnover: implications of catchment structure for riparian buffering and stream water sources. Water Resources Research, 46(10), 1–18. https://doi.org/10.1029/2009WR008818.
Jenson SK, Domingue JO. 1988. Extracting topographic structure from digital elevation data for geographic information system analysis. Photogrammetric Engineering and Remote Sensing 54(11):1593–1600. doi: 0099-1112/88/5411-1593$02.25/0.
Kendall, C., & McDonnell, J. J. (1998). Isotope tracers in catchment hydrology. Amsterdam: Elsevier.
Kenkel, N. C. (1988). Spectral analysis of hummock-hollow pattern in a weakly minerotrophic mire. Vegetatio, 78(1–2), 45–52. https://doi.org/10.1007/BF00045638.
Klaus, J., McDonnell, J. J., Jackson, C. R., Du, E., & Griffiths, N. A. (2015). Where does streamwater come from in low-relief forested watersheds? A dual-isotope approach. Hydrology and Earth System Sciences, 19(1), 125–135. https://doi.org/10.5194/hess-19-125-2015.
Kværner, J., & Kløve, B. (2006). Tracing sources of summer streamflow in boreal headwaters using isotopic signatures and water geochemical components. Journal of Hydrology, 331(1–2), 186–204. https://doi.org/10.1016/j.jhydrol.2006.05.008.
Landwehr JM, Coplen TB. 2006. Line-conditioned excess: a new method for characterizing stable hydrogen and oxygen isotope ratios in hydrologic systems. In Isotopes in Environmental Studies - Aquatic Forum 2004. IAEA; 132–135.
Leibundgut, C., Maloszewski, P., & Külls, C. (2009). Tracers in hydrology. Wiley.
Lessels, J. S., Tetzlaff, D., Birkel, C., Dick, J. J., & Soulsby, C. (2016). Water sources and mixing in riparian wetlands revealed by tracers and geospatial analysis. Water Resources Research, 52(1), 456–470. https://doi.org/10.1002/2015WR017519.
Lloyd, C. E. M., Freer, J. E., Johnes, P. J., & Collins, A. L. (2016). Technical note: testing an improved index for analysing storm discharge–concentration hysteresis. Hydrology and Earth System Sciences, 20(2), 625–632. https://doi.org/10.5194/hess-20-625-2016.
Malhotra, A., Roulet, N. T., Wilson, P., Giroux-Bougard, X., & Harris, L. I. (2016). Ecohydrological feedbacks in peatlands: an empirical test of the relationship among vegetation, microtopography and water table. Ecohydrology, 9(7), 1346–1357. https://doi.org/10.1002/eco.1731.
McDonnell, J. J., McGlynn, B. L., Kendall, K., Shanley, J. B., & Kendall, C. (1998). The role of near-stream riparian zones in the hydrology of steep upland catchments. IAHS-AISH Publication, 248, 173–180 Available at: http://pubs.er.usgs.gov/publication/70020116.
McGlynn, B. L., & McDonnell, J. J. (2003). Quantifying the relative contributions of riparian and hillslope zones to catchment runoff. Water Resources Research, 39(11), 1310. https://doi.org/10.1029/2003wr002091.
McGlynn, B. L., Mcdonnell, J. J., Seibert, J., & Kendall, C. (2004). Scale effects on headwater catchment runoff timing, flow sources, and groundwater-streamflow relations. Water Resources Research, 40(April), 1–14. https://doi.org/10.1029/2003WR002494.
Naiman, R. J., & Decamps, H. (1997). The ecology of interfaces: riparian zones. Annual Review of Ecology, Evolution, and Systematics, 28(102), 621–658. https://doi.org/10.1146/annurev.ecolsys.28.1.621.
Neal, C. (2001). Alkalinity measurements within natural waters: towards a standardised approach. Science of the Total Environment, 265(1–3), 99–113. https://doi.org/10.1016/S0048-9697(00)00652-5.
Neal, C., Hill, T., Hill, S., & Reynolds, B. (1997). Acid neutralization capacity measurements in surface and ground waters in the Upper River Severn, Plynlimon: from hydrograph splitting to water flow pathways. Hydrology and Earth System Sciences, 1(3), 687–696. https://doi.org/10.5194/hess-1-687-1997.
Partington, D., Brunner, P., Frei, S., Simmons, C. T., Werner, A. D., Therrien, R., Maier, H. R., Dandy, G. C., & Fleckenstein, J. H. (2013). Interpreting streamflow generation mechanisms from integrated surface-subsurface flow models of a riparian wetland and catchment. Water Resources Research, 49(9), 5501–5519. https://doi.org/10.1002/wrcr.20405.
Penna, D., van Meerveld, H. J., Oliviero, O., Zuecco, G., Assendelft, R., Dalla Fontana, G., & Borga, M. (2015). Seasonal changes in runoff generation in a small forested mountain catchment. Hydrological Processes, 29(8), 2027–2042. https://doi.org/10.1002/hyp.10347.
Penna, D., van Meerveld, H. J., Zuecco, G., Dalla Fontana, G., & Borga, M. (2016). Hydrological response of an Alpine catchment to rainfall and snowmelt events. Journal of Hydrology, 537, 382–397. https://doi.org/10.1016/j.jhydrol.2016.03.040.
Peralta-Tapia, A., Sponseller, R. A., Ågren, A., Tetzlaff, D., Soulsby, C., & Laudon, H. (2015). Scale-dependent groundwater contributions influence patterns of winter baseflow stream chemistry in boreal catchments. Journal of Geophysical Research: Biogeosciences, 120(5), 847–858. https://doi.org/10.1002/2014JG002878.
Qu, Y., & Duffy, C. J. (2007). A semidiscrete finite volume formulation for multiprocess watershed simulation. Water Resources Research, 43(8), 1–18. https://doi.org/10.1029/2006WR005752.
R Core Team. 2017. R: a language and environment for statistical computing. R Foundation for Statistical Computing, Vienna. Available at: https://www.r-project.org
Rietkerk, M., Dekker, S. C., Wassen, M. J., Verkroost a, W. M., & Bierkens, M. F. P. (2004). A putative mechanism for bog patterning. The American Naturalist, 163(5), 699–708. https://doi.org/10.1086/383065.
Šanda, M., Vitvar, T., Kulasová, A., Jankovec, J., & Císlerová, M. (2014). Run-off formation in a humid, temperate headwater catchment using a combined hydrological, hydrochemical and isotopic approach (Jizera Mountains, Czech Republic). Hydrological Processes, 28(8), 3217–3229. https://doi.org/10.1002/hyp.9847.
Scheliga, B., Tetzlaff, D., Nuetzmann, G., & Soulsby, C. (2017). Groundwater isoscapes in a montane headwater catchment show dominance of well-mixed storage. Hydrological Processes, 31(March), 1–16. https://doi.org/10.1002/hyp.11271.
Shi, X., Thornton, P. E., Ricciuto, D. M., Hanson, P. J., Mao, J., Sebestyen, S. D., Griffiths, N. A., & Bisht, G. (2015). Representing northern peatland microtopography and hydrology within the community land model. Biogeosciences, 12(21), 6463–6477. https://doi.org/10.5194/bg-12-6463-2015.
Soulsby, C., Tetzlaff, D., van den Bedem, N., Malcolm, I. A., Bacon, P. J., & Youngson, A. F. (2007). Inferring groundwater influences on surface water in montane catchments from hydrochemical surveys of springs and streamwaters. Journal of Hydrology, 333(2–4), 199–213. https://doi.org/10.1016/j.jhydrol.2006.08.016.
Soulsby, C., Birkel, C., Geris, J., Dick, J. J., Tunaley, C., & Tetzlaff, D. (2015). Stream water age distributions controlled by storage dynamics and nonlinear hydrologic connectivity: modeling with high-resolution isotope data. Water Resources Research, 51(9), 7759–7776. https://doi.org/10.1002/2015WR017888.
Soulsby C, Bradford J, Dick JJ, McNamara JP, Geris J, Lessels JS, Blumstock M, Tetzlaff D. 2016. Using geophysical surveys to test tracer-based storage estimates in headwater catchments. Hydrological Processes (April) https://doi.org/10.1002/hyp.10889.
Soulsby, C., Dick, J., Scheliga, B., & Tetzlaff, D. (2017). Taming the flood—how far can we go with trees? Hydrological Processes, 31(17), 3122–3126. https://doi.org/10.1002/hyp.11226.
Sprenger, M., Tetzlaff, D., Tunaley, C., Dick, J. J., & Soulsby, C. (2017). Evaporation fractionation in a peatland drainage network affects stream water isotope composition. Water Resources Research, 53(1), 851–866. https://doi.org/10.1002/2016WR019258.
Sun, H., Kasahara, T., Otsuki, K., Saito, T., & Onda, Y. (2016). Spatio-temporal streamflow generation in a small, steep headwater catchment in western Japan. Hydrological Sciences Journal, 62(5), 1–12. https://doi.org/10.1080/02626667.2016.1266635.
Tetzlaff, D., & Soulsby, C. (2008). Sources of baseflow in larger catchments—using tracers to develop a holistic understanding of runoff generation. Journal of Hydrology, 359(3–4), 287–302. https://doi.org/10.1016/j.jhydrol.2008.07.008.
Tetzlaff, D., Soulsby, C., Bacon, P. J., Youngson, A. F., Gibbins, C., & Malcolm, I. A. (2007b). Connectivity between landscapes and riverscapes—a unifying theme in integrating hydrology and ecology in catchment science? Hydrological Processes, 21(10), 1385–1389. https://doi.org/10.1002/hyp.6701.
Tetzlaff, D., Soulsby, C., Waldron, S., Malcolm, I. A., Bacon, P. J., Dunn, S. M., Lilly, A., & Youngson, A. F. (2007a). Conceptualization of runoff processes using a geographical information system and tracers in a nested mesoscale catchment. Hydrological Processes, 21(10), 1289–1307. https://doi.org/10.1002/hyp.6309.
Tetzlaff, D., Uhlenbrook, S., Eppert, S., & Soulsby, C. (2008). Does the incorporation of process conceptualization and tracer data improve the structure and performance of a simple rainfall-runoff model in a Scottish mesoscale catchment? Hydrological Processes, 22(14), 2461–2474. https://doi.org/10.1002/hyp.6841.
Tetzlaff, D., Capell, R., & Soulsby, C. (2012). Land use and hydroclimatic influences on faecal indicator organisms in two large Scottish catchments: towards land use-based models as screening tools. Science of the Total Environment, 434, 110–122. https://doi.org/10.1016/j.scitotenv.2011.11.090.
Tetzlaff, D., Birkel, C., Dick, J. J., Geris, J., & Soulsby, C. (2014). Storage dynamics in hydropedological units control hillslope connectivity, runoff generation, and the evolution of catchment transit time distributions. Water Resources Research, 50(2), 969–985. https://doi.org/10.1002/2013WR014147.
Tunaley C, Tetzlaff D, Soulsby C. 2017. Scaling effects of riparian peatlands on stable isotopes in runoff and DOC mobilization. Journal of Hydrology (in review) 549: 220–235 doi: https://doi.org/10.1016/j.jhydrol.2017.03.056, .
Van der Ploeg, M. J., Appels, W. M., Cirkel, D. G., Oosterwoud, M. R., Witte, J.-P. M., & van der Zee, S. E. A. T. M. (2012). Microtopography as a driving mechanism for ecohydrological processes in shallow groundwater systems. Vadose Zone Journal, 11(3), 0. https://doi.org/10.2136/vzj2011.0098.
van Huijgevoort, M. H. J., Tetzlaff, D., Sutanudjaja, E. H., & Soulsby, C. (2016). Using high resolution tracer data to constrain water storage, flux and age estimates in a spatially distributed rainfall-runoff model. Hydrological Processes, 30(25), 4761–4778. https://doi.org/10.1002/hyp.10902.
van Meerveld, H. J., Seibert, J., & Peters, N. E. (2015). Hillslope-riparian-stream connectivity and flow directions at the Panola Mountain Research Watershed. Hydrological Processes, 29(16), 3556–3574. https://doi.org/10.1002/hyp.10508.
Vidon PGF. 2017. Not all riparian zones are wetlands: understanding the limitation of the “wetland bias” problem. Hydrological Processes (February): 3–5 doi: https://doi.org/10.1002/hyp.11153.
Von Freyberg, J., Radny, D., Gall, H. E., & Schirmer, M. (2014). Implications of hydrologic connectivity between hillslopes and riparian zones on streamflow composition. Journal of Contaminant Hydrology, 169, 62–74. https://doi.org/10.1016/j.jconhyd.2014.07.005.
Wang, H., Tetzlaff, D., Dick, J. J., & Soulsby, C. (2017). Assessing the environmental controls on Scots pine transpiration and the implications for water partitioning in a boreal headwater catchment. Agricultural and Forest Meteorology, 240–241(November 2016), 58–66. https://doi.org/10.1016/j.agrformet.2017.04.002.
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Scheliga, B., Tetzlaff, D., Nuetzmann, G. et al. Assessing runoff generation in riparian wetlands: monitoring groundwater–surface water dynamics at the micro-catchment scale. Environ Monit Assess 191, 116 (2019). https://doi.org/10.1007/s10661-019-7237-2
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DOI: https://doi.org/10.1007/s10661-019-7237-2